/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package dateManager;

import friendManager.AddFriendServlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.swing.JOptionPane;
import loginRegister.LoginBean;

/**
 *
 * @author DELL
 */
public class DeleteDateServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet DeleteDateServlet</title>");            
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet DeleteDateServlet at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    
    
    
    
            public void wrong1() {
        String msg = "请把日期输入完整！";
        String title = "信息提示";
        int type = JOptionPane.YES_NO_CANCEL_OPTION;
        JOptionPane.showMessageDialog(null, msg, title, type);

    }

    public void wrong2() {
        String msg = "请输入正确的日期！";
        String title = "信息提示";
        int type = JOptionPane.YES_NO_CANCEL_OPTION;
        JOptionPane.showMessageDialog(null, msg, title, type);

    }



    public void wrong3() {
        String msg = "该日程不存在，删除失败！";
        String title = "信息提示";
        int type = JOptionPane.YES_NO_CANCEL_OPTION;
        JOptionPane.showMessageDialog(null, msg, title, type);

    }
    
    public void right() {
        String msg = "删除日程成功！";
        String title = "信息提示";
        int type = JOptionPane.YES_NO_CANCEL_OPTION;
        JOptionPane.showMessageDialog(null, msg, title, type);

    }
    
    
    
    
    
    
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
       
                 String year = new String(request.getParameter("year").getBytes("ISO-8859-1"), "UTF-8");

        String month = new String(request.getParameter("month").getBytes("ISO-8859-1"), "UTF-8");
        String day = new String(request.getParameter("day").getBytes("ISO-8859-1"), "UTF-8");

       
        String date ="20"+year+"-"+month+"-"+day;
        
        if (year.length() == 0 || month.length() == 0 || day.length() == 0  ) {
            wrong1();
           
            response.sendRedirect("http://localhost:8081/PersonInforMSys/dateManager/deleteDate.jsp");
        } else if(year.length()>2||Integer.parseInt(year)<16||Integer.parseInt(month)<1||Integer.parseInt(month)>12||
                Integer.parseInt(day)<1||Integer.parseInt(year)>31){
            wrong2();
            response.sendRedirect("http://localhost:8081/PersonInforMSys/dateManager/deleteDate.jsp");
        }
 
        else{
            try {
                
                Connection con = null;
                java.sql.Statement stmt = null;
                ResultSet rs = null;

                Class.forName("com.mysql.jdbc.Driver");

                String url = "jdbc:mysql://localhost:3306/person?useUnicode=true&characterEncoding=gbk";

                con = DriverManager.getConnection(url, "skyline", "739349");

                stmt = con.createStatement();

                String userName = null;
                HttpSession session = request.getSession();
                ArrayList login = (ArrayList) session.getAttribute("login");
                if (login == null || login.size() == 0) {
                    response.sendRedirect("http://localhost:8081/PersonInforMSys/login.jsp");
                } else {
                    for (int i = login.size() - 1; i >= 0; i--) {

                        LoginBean nn = (LoginBean) login.get(i);
                        userName = nn.getUserName();

                    }
                }
                String sql = "select * from date where date='" + date + "' and userName='" + userName + "'";

                try {
                     rs = stmt.executeQuery(sql);
                } catch (Exception e) {
                    log("wrong:", e);
                }
                   
                rs.last();
                int k = rs.getRow();
                if (k <1) {
                    wrong3();

                    response.sendRedirect("http://localhost:8081/PersonInforMSys/dateManager/deleteDate.jsp");

                } else {

                
                      String sql2 ="delete from  date    where userName='" + userName + "' and date='" + date + "'";
                    try {
                        stmt.executeUpdate(sql2);
                    } catch (Exception e) {
                        log("Error:", e);
                        
                    }
                     
                    ArrayList dateList = null;
                    dateList = new ArrayList();
                    String sql3 = "select * from date where userName='" + userName + "'";

                    rs = stmt.executeQuery(sql3);
                  
                    while (rs.next()) {
                         
                        LookDateBean dateBean = new LookDateBean();
                        dateBean.setDate(rs.getString("date"));
                        dateBean.setThing(rs.getString("thing"));
                  ;
                        dateList.add(dateBean);
                        session.setAttribute("dateList", dateList);
                         
                    }
                   
                    rs.close();;
                    stmt.close();
                    con.close();
                    
                   right();
                   response.sendRedirect("http://localhost:8081/PersonInforMSys/dateManager/lookDate.jsp");
                }

            } catch (SQLException ex) {
                Logger.getLogger(AddFriendServlet.class.getName()).log(Level.SEVERE, null, ex);
            } catch (Exception e) {
            }

        }
        
        
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doGet(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
